{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Using an ovine pseudo - afferent lymph cannulation model to capture APC that traffic from the site of injection to the local lymph node , we show that 40 - 50nm nanoparticles are taken up at the site of injection by dendritic cells ( DCs ) migrating to the draining lymph node ."}
{"Chemical": []}